I am looking to install a heat pump and would like to install a smart thermostat to control it. However I cannot work out what (if any) NZ heat pumps are compatible with the various smart thermostats (they all assume you have an existing thermostat on the wall and can look at the wires) - the heat pump installers I have spoken to don't seem to be willing to look into it (just saying "it has a wifi module - use that...). All the thermostats say they need 24volt power (not high voltage), but not sure how to determine whether a heat pump comes with a low voltage thermostat that I could replace with one of these.
I am using Smartthings as a home automation hub, so ideally want a thermostat that is compatible with that.
If anyone knows if any of these can work with NZ heat pumps, or a Wellington heat pump installer who has installed any of these, I would be most grateful.
1. Zen Thermostat (marketed as available in NZ) - http://zenthermostat.com/
2. Honeywell Lyric (seem to be able to buy from NZ vendors) - http://yourhome.honeywell.com/en/products/thermostat/lyric-thermostat
3. ecobee3 (not sure it is sold in NZ) - https://www.ecobee.com/; or
4. Nest (not sold in NZ) - https://nest.com/thermostat/meet-nest-thermostat/